Plasterer&#39;s hawk



Dec. 26, 1950 B. w. DALTON PLASTERERS HAWK Filed April 30, 1948 PatentedDec. 26, 1950 UNITED STATES PATENT OFFICE PLASTERERS HAWK Byron W.Dalton, Chicago, Ill.

Application April 30, 1948, Serial No. 24,186

7 Claims. (Cl. 4'7 2-135) My invention relates to a hawk on which tocarry a small supply of fluid plaster preliminary to its being taken upupon a trowel for application to a wall or ceiling where it is to bespread.

The principal object of this invention is the con` C struction of a hawkhaving a hollow handle adapted for connection with a flexible conduitthrough which plaster may be flowed under pressure for deposit upon thetop face of the hawk; and in such a construction to provide for acontrolled supply of the plaster to the hawk by means of a valve whichnormally shuts off the flow of fluid plaster, but which, in response tomanual pressure, will release the plaster for flowing onto the top faceof the hawk. Other minor objectives are also attained by my invention aswill appear hereinafter from the ensuing detailed description taken inconjunction with the accompanying drawing in which is described apreferred construction in the manner following:

Figure 1 is a view in perspective of the present hawk in the hands of aworkman who is shown in the act of applying plaster to a wall, the hawkbeing held in the normal operative position which permits some of theuid plaster to be taken up by the trowel from time to time;

Fig. 2 is a side elevation of the hawk showing the position of theworkmans hand in relation to the valve by which the flow of fluidplaster to the top face of the hawk is controlled;

Fig. 3 is an enlarged vertical section through the hawk and itssupporting handle showing a slight modification;

Fig. 4 is a horizontal section, lookingupwardly, taken on line 4-4 ofFig. 3; and

Fig. 5 is a view in perspective looking toward the top face of the blockforming part of the slide valve. The present hawk H comprises aplaster-supporting plae ID of aluminum or the like, and dei sirably ofrectangular contour in accordance with usual practice. On the under sideof the hawk, centrally thereof, is affixed a reenforcing disc I2 to theunderside of which is secured a block I6, formed on its upper face witha diametric channel IB which provides a guideway for a slide valve I8 inthe general form of a strap. This valve which is reciprocable close tothe hawk is conned between the disc I2 and block I4 so as to havecapacity for movement only back and forth within the guideway I6. Theslide valve I 8 is apertured at 20, and at its outer end is providedwith a downturned iinger 22 adapted to receive pressure from the thumb tof the workmans hand (see Fig. 2). The hawk plate I0'. reinforcing discI2 and block I i are desirably interconnected in unitary relation as byrivets 2t whose heads at the top are iinished off smooth and flush withthe top face of the hawk.

Formed centrally of the hawk plate I0, the disc I2, and the block I4 areregistering openings 24 which may be threaded for coaction with theexternally threaded upper end portion of a sleeve 26 which extends fromthe under face of the hawk 'plate downwardly within a tubular grip 23,the sleeve and grip together constituting a handle convenient forholding by the fingers f of a workmans hand. As shown in Fig. 2, whenthe hawk is supported in the hand, the thumb t is in position to engagethe finger of the slide valve I8 and push the same toward the axis ofthe hawk handle.

The lower end portion of the sleeve 2li is internally threaded forcoaction with a coupling C which is extended therebelow for threadedconnection with a flexible conduit 3D of rubber or the like. Thisconduit at its opposite end is in connection with a drum 32 in which theiiuid plaster is contained. The supply drum may be carried upon awheeled platform 34 constituting a dolly which may be readily movedabout from place to place either on the floor where the plasteringoperation is being carried on, or perhaps on a level either above orbelow. In the former case, the plaster will flow by gravity to the hawkto be released upon its top face in accordance with the workmansmanipulations of the slide valve I8; but if the plaster supply bemaintained on the same floor or at a lower level as that whereon theworkman is performing his job (this arrangement beingsuggested in Fig.l), then it will be desirable for the dolly to mount a compressor orpump P to be driven by a motor M, the compressorbeing installed inloperative relation to the plaster which is to be delivered from the'container l32. AA short length of conduit is all that need be used, itbeing feasible always to shift the dolly from place to place to followclosely behind the plasterer wherever he may be.` From time to time, asrequired, fresh duid plaster is dumped into-the drum so as to assure anample supply in-reserve. If desired, morethan one conduit 4may beconnected to the supply source '(or to thepump'P), each conduit leadingto a separate hawk to be used by a workman in the same vicinity who mavbe engaged in the same plasering operation.

The block I @which provides the guide for the slide valve I8 may also beformed on its lunder face with a pair of slots 40, one on each side ofthe channel I6, each slot facing out upon one side of the block which isremote from the finger end of the slide valve. Within each slot isiitted a tension spring 42 (see Fig. 4) anchored at 44 near the innerend of the slot and extended outwardly through its open end forconnection with the proximate end of a depending flange 4t which mayprotrude laterally beyond the slide valve at that point. This flange isadapted to engage the block I4 to serve as a stop when the slide valveis operated to one extreme position (see Fig. 4) in response to tensionof the springs 42. In this position the aperture 2l) through the slidevalve is out of register with the opening 24 in the block I 4 and thecentral passageway through the sleeve 26. If, however, the slide valvebe pushed inwardly against the tension of the springs 42, a stop plate48 will limit its advance to a point where the valve aperture 20 is infull register with the block hole I4 whereby to open up a passageway forthe flow of plaster through the sleeve 26 to the top race of the hawkplate. The rate of ow may be controlled as by opening the valve for lessthan the full distance, and the amount of plaster thus released fordeposit upon the top face of the hawk may also be determined by thelength of time that the valve is held open. A iiexible guard 49 ofrubber or the like is supported in place just below the block I4 so asto protect the hand of the workman.

A slight modication is suggested in Fig. 3 wherein a spring arm 5thaving an endwise bowed or ogee contour is connected as by screws 5I and52 at opposite ends to the finger piece 22 and grip 28, this arm beingengaged by the fingers so that inward pressure thereon will advance theslide valve to open position. Release of manual pressure will befollowed by return of the valve to its open position by the tension ofthe springs 42, or of the arm 5i! whose use may render the employment ofother springs unnecessary.

In operation, the workman starts with an empty hawk but with allconnections made to the supply source from which the plaster is to bereceived whenever the slide valve I8 is manually operated to an openposition. When ready, the workman opens the valve to release a desiredquantity of the fluid plaster upon the top face of the hawk. The valveis then allowed to close, and the plaster thus deposited on the hawk maythen be taken up by the trowel and applied to the surface of the wall orceiling where the work is to be done. This operation may be repeatedfrom time to time, as necessary, so that the workman is always assuredof a supply of plaster whenever he operates the valve. It is unnecessarythat the hawk carry any reserve supply of plaster, as is often done atthe present time, but only enough to satisfy the immediate needs of theworkman. It will be found that the weight of the hawk, plus that of theattached conduit, will approximate that of the conventional hawk due, inpart, to the fact that the amount of plaster ordinarily carried by thepresent hawk is less than that which is now customary.

Plaster, even in the iiuid state, is of relatively gritty material whoseow is difiicult to control with a valve. I find, however, that a slidevalve such as the one herein shown is entirely satisfactory for thepurposes of this invention. It is relatively leak-proof, and will notabrade or wear unduly, and it is easy and dependable in its operation.One feature of advantage is that it is' so compact that it may beoperated by the thumb of the same hand whose remaining fingers grip thehandle of the hawk. It is, therefore, possible for one and the same handto hold the hawk and manipulate the valve.

To maintain a balance in the frictional forces which are encounteredwith operation of the valve, it may be desirable to use two springswhich are symmetrical with reference to the plane which proceedscentrally of the slide valve and axially of the opening which ituncovers. Also the few parts which are used in putting together thisvalve conduces to a carefree operation and also lightweight-bothimportant factors in a plaster hawk of this kind.

I claim:

l. A plasterers hawk equipped with a supporting handle havingtherethrough a passageway opening out upon the top face oi the hawk, avalve extended crosswise of the handle for opening and closing thepassageway therethrough, a flexible conduit connecting the lower end ofthe handle with a source of plaster supply for conducting plasterthrough the handle to the top face of the hawk subject to control of thevalve, and valve-operating means arranged close to the handle inposition for manipulation by the same hand which grips the hawk handle.

2. A plasterers hawk according to claim l in which a guide block with anopening therethrough is affixed between the handle and the under face ofthe hawk, and in which said valve is apertured and slidable andoperatively fitted within the guide block to open and close the openingtherethrough whereby to control the flow of plaster through to the topface of the hawk.

3. A plasterers hawk according to claim 1 in which a guide block with anopening therethrough is .afxed between the handle and the under face ofthe hawk, in which said valve is apertured and slidable and operativelytted within the guide block to open and close the opening therethroughwhereby to control the flow of plaster through to the top face of thehawk, and in which spring means interconnects the slide valve and guideblock to urge the valve to clo`sed position, the slide valve beingprovided with stop means engageable alternately with spaced points onthe guide block to limit sliding movements of the Valve to substantiallythe minimum distance required for full opening or closing of the valve.

4. A plasterers hawk according to claim 1 in which spring meansinterconnects the valve and handle to induce movement of the valvecrosswise of the handle, the spring means being arranged at oppositesides of the valve so as to exert in all positions of the valve abalanced force on opposite sides of a plane radially of the handle andlengthwise of the valve.

5. A plasterers hawk comprising, in combination, a reenforcing discadjacent the under face of the hawk, a, block adjacent the under face ofthe reenforcing disc, there being in the upper face of the block atransverse channel closed over its top by the reenforcing disc, meansinterconnecting the block, disc, and hawk in unitary relation, therebeing registering openings through the hawk, disc, and block channel ata point substantially centrally of the hawk, a handle having its upperend portion entered through the said openings and in threaded engagementwith the block, plate, and hawk and terminating substantially flush withthe top face of the latter, means flexibly connecting the opposite endof the handle with .a source of plaster supply, a reciprocable valvefitted within the block channel to be guided thereby in its slidingmovements, the valve being formed therethrough at one point with anaperture adapted to be brought into and out of register with the openingin the block channel whereby to open or close therethrough a passagewayfor the flowing plaster, and spring means in connection with the valveurging the same normally to a, closed position.

6. A plasterers hawk equipped with a supporting handle havingtherethrough a passageway opening out upon the top face of the hawk, avalve extended crosswise of the handle for opening and closing thepassageway therethrough, a flexible conduit connecting the lower end ofthe handle with a source of plaster supply for conducting plasterthrough the handle to the top face of the hawk subject to control of thevalve, and resilient valve operating means extended along the handle andmovable toward and from the axis thereof arranged for manipulationinwardly by the same hand which grips the hawk handle, the valveoperating means acting to return the valve outwardly when pressurethereon is relaxed.

7. A plasterers hawk equipped with a supporting handle extendingdownwardly from the lower face of the hawk and having a passagewayopening out upon the top face of the hawk, a valve extending crosswiseof the handle for opening and closing the passageway therethrough, aflexible conduit connecting the lower end of the handle with a, sourceof plaster supply for conducting plaster through the handle to the topface of the hawk subject to control of the valve, and valve operatingmeans located closely adjacent the upper end of the handle in positionfor manipulation by the same hand which grips the hawk handle to controlthe flow of plaster to the top face of the hawk.

BYRON WM. DALTON.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,053,645 Reimer Feb. 18, 19131,158,460 Doll Nov. 2, 1915 1,716,317 Lowy June 4, 1929 FOREIGN PATENTSNumber Country Date 375,741 Germany May 18, 1923

